Philips EPIQ 7 User Manual page 78

Safety
Typical Interference on Ultrasonic Imaging Systems
Imaging Mode
2D or 3D
Color
Doppler
M-mode
1. Electrostatic discharge (ESD) caused by discharging of electric charge buildup on insulated
surfaces or persons.
2. Radio frequency (RF) energy from RF transmitting equipment such as portable phones,
handheld radios, wireless devices, commercial radio and TV stations, and so on.
3. Conducted interference on power lines or connected cables caused by other equipment,
such as switching power supplies, electrical controls, and natural phenomena such as
lightning.
78
ESD
1
Change of operating mode,
system settings, or system
reset. Brief flashes in the
displayed or recorded
image.
Change of operating mode,
system settings, or system
reset. Brief flashes in the
displayed or recorded
image.
Change of operating mode,
system settings, or system
reset. Brief flashes in the
displayed or recorded
image.
Change of operating mode,
system settings, or system
reset. Brief flashes in the
displayed or recorded
image.
Electromagnetic Compatibility
RF
2
For sector imaging
transducers, white radial
bands or flashes in the
center lines of the image.
For linear imaging
transducers, white vertical
bands, sometimes more
pronounced on the sides of
the image.
Color flashes, radial or
vertical bands, increase in
background noise, or
changes in image color.
Horizontal lines in the
spectral display or tones,
abnormal noise in the
audio, or both.
Increase in the image
background noise or white
M-mode lines.
EPIQ 7 User Manual 4535 617 25341
Power Line
3
White dots, dashes, or
diagonal lines near the
center of the image.
Color flashes, dots, dashes,
or changes in the color
noise level.
Vertical lines in the spectral
display, "popping" noise in
the audio, or both.
White dots, dashes,
diagonal lines, or increase
in image background noise.